xubuntu_error

in
[  379.469203]          res 51/40:08:38:3b:88/00:00:00:00:00/40 Emask 0x409 (media error) <F>
[  379.469207] ata1.00: status: { DRDY ERR }
[  379.469210] ata1.00: error: { UNC }
[  379.472394] ata1.00: configured for UDMA/133
[  379.472406] ata1: EH complete
[  383.480294] ata1.00: exception Emask 0x0 SAct 0x2000000 SErr 0x0 action 0x0
[  383.480300] ata1.00: irq_stat 0x40000008
[  383.480306] ata1.00: failed command: READ FPDMA QUEUED
[  383.480314] ata1.00: cmd 60/08:c8:38:3b:88/00:00:00:00:00/40 tag 25 ncq 4096 in
[  383.480316]          res 51/40:08:38:3b:88/00:00:00:00:00/40 Emask 0x409 (media error) <F>
[  383.480320] ata1.00: status: { DRDY ERR }
[  383.480324] ata1.00: error: { UNC }
[  383.483443] ata1.00: configured for UDMA/133
[  383.483457] ata1: EH complete
[  387.491388] ata1.00: exception Emask 0x0 SAct 0x10000000 SErr 0x0 action 0x0
[  387.491394] ata1.00: irq_stat 0x40000008
[  387.491400] ata1.00: failed command: READ FPDMA QUEUED
[  387.491408] ata1.00: cmd 60/08:e0:38:3b:88/00:00:00:00:00/40 tag 28 ncq 4096 in
[  387.491410]          res 51/40:08:38:3b:88/00:00:00:00:00/40 Emask 0x409 (media error) <F>
[  387.491414] ata1.00: status: { DRDY ERR }
[  387.491418] ata1.00: error: { UNC }
[  387.494564] ata1.00: configured for UDMA/133
[  387.494580] sd 0:0:0:0: [sda] Unhandled sense code
[  387.494583] sd 0:0:0:0: [sda]  Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  387.494588] sd 0:0:0:0: [sda]  Sense Key : Medium Error [current] [descriptor]
[  387.494594] Descriptor sense data with sense descriptors (in hex):
[  387.494598]         72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
[  387.494612]         00 88 3b 38
[  387.494618] sd 0:0:0:0: [sda]  Add. Sense: Unrecovered read error - auto reallocate failed
[  387.494626] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 00 88 3b 38 00 00 08 00
[  387.494640] end_request: I/O error, dev sda, sector 8928056
[  387.494663] ata1: EH complete
[ 1901.832139] usb 4-2: USB disconnect, device number 4